Your AI chatbot works perfectly — it retrieves relevant documents, grades their quality, and generates accurate answers. But your monthly OpenAI bill shows $3,000, and when you analyze the logs, a disturbing pattern emerges: 30% of queries are simple questions like "What are you?" or "Hello" that trigger your entire expensive RAG pipeline. Each "Hi" costs $0.05 and takes 25 seconds to process a full vector search, document grading, and LLM generation for a greeting.